Pulse drive circuit used for high-voltage drop-down pulse generator

Abstract

The invention discloses a pulse driving circuit for a high-voltage pull-down pulse generating device, which includes a driving circuit including a unipolar high-voltage DC power supply, a synchronous pulse signal source, a fast switching component, a driving pulse output terminal, and a unipolar high-voltage DC power supply passing through The series high-voltage resistance is connected with one end of the switch module of the fast switch part and the pulse output end, the other end of the switch circuit is grounded, and the synchronous pulse signal source is connected with the trigger module of the fast switch part to control the opening or closing of the switch module of the fast switch part; the present invention The sensitivity and resolution of the time-of-flight mass spectrometer are improved through the drive circuit, and the design is simple and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of matrix-assisted laser analysis time-of-flight mass spectrometry, and in particular relates to a pulse generating device. Background technique [0002] Matrix-assisted laser desorption ion source refers to that in a small area, in a very short time interval, the laser provides high energy to the sample and heats them very quickly, which can avoid thermal decomposition of heat-sensitive compounds, matrix molecules It can effectively absorb the energy of the laser and indirectly transfer it to the sample molecules, so as to be ionized. Since the process of laser bombardment of the sample is completed in a very short time, a high-voltage electric field and a nanosecond-level sudden change of electric field and laser are required. Pulse coordination enables the ionized ions to leave the sample plate after laser bombardment, delay in the high-voltage electric field, quickly accelerate in the nanosecond-level sudden chang...

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Problems solved by technology

[0003] The electric field control in matrix-assisted laser desorption ion source plays a vital role in the sensitivity and resolution of time-of-flight mass spectrometry. However, in the prior art, a high voltage of 0~±800v is mainly used, the pulse amplitude is only ±800V, and the pulse width is as high as About 100ms, which cannot meet the accuracy requirements, and the corresponding circuit structure is also more complicated, and the response is slower

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